Lawn mower-tractor



FIG. 1 is a side elevational view of a lawn mower-tractor showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof opposite to that shown in FIG. 1;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a front elevational view thereof. 

The ornamental design for a lawn mower-tractor, as shown. 